Title :
Two-stage configuration for 60W universal-line AC-DC adapter
Author :
Shin-Young, Cho ; Lee Il-Oun ; Jeong-Eon, Park ; Gun-Woo, Moon
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea
Abstract :
Universal-line (90-264Vac) AC-DC adapter poses a major challenge to maintain a high efficiency across the entire line. At the same time, the reduction of its weight and size is required. Usually, low-power AC-DC adapter is implemented with a single-stage AC-DC flyback converter. To further improve the efficiency, valley switching technique and secondary synchronous rectifier is applied to it. However, it still has low efficiency. Therefore, two-stage adapters are required to have higher efficiency under the entire line. Therefore, this paper presents the comparative evaluation for the 60W two-stage adapter with the same size as the conventional single-stage adapter. In two-stage adapter, PFC stage consists of boost converter or buck converter and DC-DC stage consists of LLC converter. Experimental results obtained on a 60W(16.5V/3.65A) notebook adapter are provided,
Keywords :
AC-DC power convertors; DC-DC power convertors; low-power electronics; power factor correction; rectifiers; switching convertors; DC-DC stage; LLC converter; PFC stage; boost converter; buck converter; current 3.65 A; low-power AC-DC adapter; notebook adapter; power 60 W; power factor correction; secondary synchronous rectifier; single-stage AC-DC flyback converter; two-stage configuration; universal line AC-DC adapter; valley switching technique; voltage 16.5 V; voltage 90 V to 264 V; Analytical models; Bridge circuits; IP networks; Adapter; LLC converter; boost PFC converter; buck PFC converter; single-stage; two-stage;
Conference_Titel :
IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-2419-9
Electronic_ISBN :
1553-572X
DOI :
10.1109/IECON.2012.6388560
